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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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2. Depository for semen during insemination. where urine leaves the body






3. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






4. Microscopic - make sure not sterile - very few bulls are actually tested






5. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






6. What helps regulate spermatogenesis?






7. 30-38 hours after estrus cycle begins






8. 14-19 (17) days






9. When are dairy cattle dehorned?






10. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






11. 265-285 days






12. Can survive ~7 days in cow. vast majority <48 hours






13. (LH) stimulates the Leydig cells to produce testosterone






14. Check feet and legs - look for masculine traits in build such as crest and muscling






15. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






16. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






17. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






18. 4-6 days






19. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






20. Larger the cow - more milk is produced; smaller the cow - less milk is produced






21. Urinary calculi.






22. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






23. 45-60 days after breeding; re-breed as required






24. 16-20 hours






25. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






26. 30 hours after estrus begins






27. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






28. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






29. What makes the milk flow through the mammary glands?






30. Start of the reproductive tract for the female. located outside of the body






31. Why does estrus happen before ovulation?






32. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






33. 10-37 (21) days






34. Allows extension of penis without fibro-elastic penis






35. 19-23 (21) days






36. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






37. 336 days






38. Luteolysis happens because of the ____________ hormone






39. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






40. Allows extension of penis without fibro-elastic penis






41. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






42. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






43. (FSH) causes egg to mature in females






44. Why Dairy calves are fed powdered milk.






45. Microscopic - make sure not sterile - very few bulls are actually tested






46. Failure to have both testis (gonads) descend






47. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






48. (male) pushes the testes outward toward the legs for a cool-down off of the body






49. Can survive ~7 days in cow. vast majority <48 hours






50. (LH) causes female's egg to break (her period)